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vE.--W. MOON BRAKE FOR DUMB WAITERS.

Patented Sept; 14, 1886. Fig, ,2.

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UNITED STATES PATENT ()FFICE.

EDWARD W. MOON, OF ST. LOUIS, MISSOURI.

BRAKE FOR DUMB-WAITERS.

SPECIFICATIQN forming part of Letters Patent No. 349,258, datedSeptember 14, 1886.

Application filed February 10, 1886. Serial No. 191,479. (No model.)

To all whom it may concern:

Be it known that I, EDWARD W. Moon, of the city of St. Louis, in theState of Missouri, have invented a certain new and useful Im- 5provement in Brakes for Dumb-Waiters, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, and in which Figure 1 isan elevation with part broken out. Fig. 2 is a vertical section at 2 2,Fig. 1,

showing some parts in elevation. Fig. 3-is a top view, parts of theceiling being broken out. Fig. 4 is a horizontal section at 4 4, Figs. 1and Fig. 5 is a side View of one side of the brake-pulley, showing itlocked, and Fig. 6 is a view of the other side, showing it unlocked.Fig. 7 is a side view of the brake pulley, showing it unlocked bydepression of 2: the brake-lever, the brake being applied to the pulley.Fig. Sis an elevation showing the edge of the pulley and the brake. Fig.9 is an inside view of the brake. Fig. 10 is a side view of thebrake-wheel, showing neither the 2 brake or lock applied to it.

This improvement relates chiefly to the lock and brake, which is appliedto the upper pulley, over which the hoisting cord or cable passes.

The features of novelty will be indicated in 0 the claims.

A is the vertical shaft, in which the cage B has movement. The cage maybe guided in any suitable manner. I show guide-cleats 0 upon it, whichengage the edges of the vertical 5 guide D. The guide D forms the outerwall 4 5 and from that over the grooved pulley. From the pulley 0 downto and beneath the grooved pulley P; from pulley P over the groovedpulley Q, having bearing in a hanger, B, attached to the bottom of thecage. From the pulley Q,

the cord passes to the fixed attachment at N.

In moving the cage upward or downward the hand is applied tothecordbetween the pulleys O and P, the downward movement of the cordlifting the cage, and vice versa. The counterbalance should be made atleast of sufficient weight to balance the cage; but as the load wouldcause the cage to descend if left to itself, it is proper to have a lockof some kind to sustain it at any elevation at which it may be placed.

The brake and lock, which form the most important feature of myinvention, will now be described. The standard S, on which the pulley Ohas bearing, has an arm, S, giving bearing to an arbor or spindle, T, onwhich is supported a rocking frame, U, which is actuated by an arm, U,to throw either end of the frame U to or from the cylindrical part 0 ofthe pulley O. The upper arm, U", of the brake-frame U,carriesabrake-shoe, U,which, by'the downward movement of the arm U, maybe brought in contact with the pulley to consequently limit or stop themovement of the car. The arm is lifted, to carry the brake-shoe out ofcontact with the pulley, by a spring or weight, V. The spring bearsagainst the lower arm or shoe U*, as seen in Figs. 1, 5, 6, 7, 8, and 9,while the weight Vis shown in Fig. 10 attached to one end of a cord, W,which passes over a grooved pulley, X, above the arm U, and descendsfrom the pulley to the arm, to which it is attached. This cord XVdescends, so that it can be grasped by any one operating or using thedumb-waiter, and by this means the arm may be pulled down for thepurpose stated, or for'the piu'pose of unlocking the pulley 0, whendesired, as will be hereinafter described. The shoe U of the lower armis inclined, and has a channel, U in which works a friction ball orblock, Y, the ball being shown in Figs. 5, 6, 7, and 11, and the blockin Fig. 10, which, as the wheel 0 turns in the direction shown by thearrow in Fig. 5, is carried toward the lower end of the shoe, and as thelower end of the shoe is nearer to the periphery of the pulley than theupper end, the descent of the ball tightens its bearing on the shoe andpulley, and so locks the pulley and prevents its rotation in thisdirection, and as limit or to stop the rotation of the pulley, and

this direction of rotation corresponds wit-h the descent of the cage,the descent of the cage is prevented by this locking of the pulley. Thislock of the pulley continues until either the pulley is turned in theopposite direction, as indicated by the arrow in Fig. 6, or the arm U ismoved downward, so as to throw the shoe U away from the periphery of thepulley, and thus relieve the pulley from the pressure of the ball orblock Y, and allow it to turn. Vhen the shoe U is moved away from thelever, the escape of the ball or block Y from the channel U is preventedby a projection, Z, against which the ball orbloek impinges. (See Fig.7.)

\Vhen the ball or block Y is in contact with the pulley O, and thepulley is turned in the direction indicated by the arrow in Fig. 6, thefriction of the pulley againstthe ball or block moves it upward in thechannel U The operation of the device is as follows: To move thedumb-waiter upward, the part of the hoisting-rope between. the pulleys Oand l is moved downward, which turns the pulley O in the direction shownby the arrow in Fig. 6. "When the cage has reached the place ofstoppage, the brakecord \V may be drawn down to apply the brake U", orthe pulley may be allowed to turn backward, (under the influence of theload upon the cage,) and in the latter case the locking device Y willarrest the rotation of the pulley. To lower the cage, if there is weightsufficientupon itto cause its descent the pulley 0 may be relieved fromthe look by pulling the brake-cord \V, and by the same movement thebrake U may be applied to limit the speed of descent. \Vhere the weightupon the cage is not sutlicient to cause its de scent, it is moveddownward by moving upward the part of the hoisting-rope between pulleysO and P, the arm U being drawn down sufficiently to relieve the pulley 0from the look.

I claim- 1. The rocking frame having a shoe with channel containing amovable ball and inclined to the periphery of a pulley 011 which thehoist ing-rope has bearing, a spring to press the shoe toward thepulley, and an arm and cord to draw the shoe away from-the pulley,substantially as and for the purpose set forth.

2. The combination, with thehoisting-rope of ahoistingqnaehine ordumb-waiter, ofa pulley, around which. pulley the rope passes, a movableshoe having a channel inclined to the pie riphery of the pulley, amovable ball in said channel, and a projection at the lower end of thechannel to prevent the escape of the ball.

3. The combination of a hoisting-rope, pulley, and a rockirame having anarm carrying a irietion-brake and an arm projecting in the oppositedirection having a channel on the side toward the periphery of thepulley inclined relatively to the periphery and eontaining a movableball, for the purpose set forth. 4. Thecombination, with thehoistingrope, pulley, and the standard having a projection thereon, ot'a rocking frame pivoted in the standard aml having an arm, a channel inthe arm, a movable ball in the channel, and suitable means for pressingthe arm against the pulley-rim, substantially as and for the purpose setforth.

' EI)\VARD \V. MOON. \Vitness s:

SAML. KNIGHT, BENJN. A. KNIGHT.

